Lemon Curd

Beat the whole eggs and 1 yolk together. Melt the butter in a saucepan on a LOW heat. Add sugar, zest and juice then the beaten eggs. Stir over a gentle heat until the mixture thickens. It should be thick enough to coat the back of a wooden spoon. CARE or you will end up with lemony scrambled eggs! Pour into a jar and seal. this should keep for about 2 weeks in the fridge-as if!